"总利润增长12%，就意味着总收入会增长12%", logic

error? simple example: rev = 100, fixed cost = 50, variable cost = 20%, then profit = 30, rev increase 12%: 100*(1+12%) = 112, fixed cost = 50, variable cost = 112 * 20% = 22.4, profit = 112 - 50 - 22.4 = 39.6. profit increase = (39.6 - 30)/30 = 32%. So profit increases at 32%, not 12%.

Also you are mixing indexing investment and 401k together, they are totally different.

所有跟帖： 

• 市场总的profit margin没有什么变化 -BayFamily- ♂ (81 bytes) () 10/14/2008 postreply 07:13:36